參數(shù)資料
型號(hào)： ADSP-2187NBSTZ-320
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 6/48頁(yè)
文件大?。?/td> 0K
描述： IC DSP CONTROLLER 16BIT 100LQFP
標(biāo)準(zhǔn)包裝： 1
系列： ADSP-21xx
類(lèi)型： 定點(diǎn)
接口： 主機(jī)接口，串行端口
時(shí)鐘速率： 80MHz
非易失內(nèi)存： 外部
芯片上RAM： 160kB
電壓 - 輸入/輸出： 1.8V，2.5V，3.3V
電壓 - 核心： 1.90V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 100-LQFP
供應(yīng)商設(shè)備封裝： 100-LQFP（14x14）
包裝： 托盤(pán)
Rev. A
|
Page 14 of 48
|
August 2006
ADSP-218xN
The IDMA port has a 16-bit multiplexed address and data bus
and supports 24-bit program memory. The IDMA port is com-
pletely asynchronous and can be written while the ADSP-218xN
is operating at full speed.
The DSP memory address is latched and then automatically
incremented after each IDMA transaction. An external device
can therefore access a block of sequentially addressed memory
by specifying only the starting address of the block. This
increases throughput as the address does not have to be sent for
each memory access.
IDMA port access occurs in two phases. The first is the IDMA
Address Latch cycle. When the acknowledge is asserted, a 14-bit
address and 1-bit destination type can be driven onto the bus by
an external device. The address specifies an on-chip memory
location, the destination type specifies whether it is a DM or PM
access. The falling edge of the IDMA address latch signal (IAL)
or the missing edge of the IDMA select signal (IS) latches this
value into the IDMAA register.
Once the address is stored, data can be read from, or written to,
the ADSP-218xN’s on-chip memory. Asserting the select line
(IS) and the appropriate read or write line (IRD and IWR
respectively) signals the ADSP-218xN that a particular transac-
tion is required. In either case, there is a one-processor-cycle
delay for synchronization. The memory access consumes one
additional processor cycle.
Once an access has occurred, the latched address is automati-
cally incremented, and another access can occur.
Through the IDMAA register, the DSP can also specify the
starting address and data format for DMA operation.
Asserting the IDMA port select (IS) and address latch enable
(IAL) directs the ADSP-218xN to write the address onto the
IAD14–0 bus into the IDMA Control Register (Figure 14). If Bit
15 is set to 0, IDMA latches the address. If Bit 15 is set to 1,
IDMA latches into the OVLAY register. This register, also
shown in Figure 14, is memory-mapped at address DM
(0x3FE0). Note that the latched address (IDMAA) cannot be
read back by the host.
When Bit 14 in 0x3FE7 is set to zero, short reads use the timing
shown in Figure 36 on Page 38. When Bit 14 in 0x3FE7 is set to
1, timing in Figure 37 on Page 39 applies for short reads in short
read only mode. Set IDDMOVLAY and IDPMOVLAY bits in
the IDMA overlay register as indicated in Table 8. Refer to the
ADSP-218x DSP Hardware Reference for additional details.
Note
: In full memory mode all locations of 4M-byte memory
space are directly addressable. In host memory mode, only
address pin A0 is available, requiring additional external logic to
provide address information for the byte.
Bootstrap Loading (Booting)
ADSP-218xN series members have two mechanisms to allow
automatic loading of the internal program memory after reset.
The method for booting is controlled by the Mode A, B, and C
configuration bits.
When the mode pins specify BDMA booting, the ADSP-218xN
initiates a BDMA boot sequence when reset is released.
The BDMA interface is set up during reset to the following
defaults when BDMA booting is specified: the BDIR, BMPAGE,
BIAD, and BEAD registers are set to 0, the BTYPE register is set
to 0 to specify program memory 24-bit words, and the
BWCOUNT register is set to 32. This causes 32 words of on-
chip program memory to be loaded from byte memory. These
32 words are used to set up the BDMA to load in the remaining
program code. The BCR bit is also set to 1, which causes pro-
gram execution to be held off until all 32 words are loaded into
on-chip program memory. Execution then begins at address 0.
The ADSP-2100 Family development software (Revision 5.02
and later) fully supports the BDMA booting feature and can
generate byte memory space-compatible boot code.
The IDLE instruction can also be used to allow the processor to
hold off execution while booting continues through the BDMA
interface. For BDMA accesses while in Host Mode, the addres-
ses to boot memory must be constructed externally to the
ADSP-218xN. The only memory address bit provided by the
processor is A0.
IDMA Port Booting
ADSP-218xN series members can also boot programs through
its internal DMA port. If Mode C = 1, Mode B = 0, and Mode A
= 1, the ADSP-218xN boots from the IDMA port. IDMA feature
can load as much on-chip memory as desired. Program execu-
tion is held off until the host writes to on-chip program memory
location 0.
BUS REQUEST AND BUS GRANT
ADSP-218xN series members can relinquish control of the data
and address buses to an external device. When the external
device requires access to memory, it asserts the Bus Request
Figure 14. IDMA OVLAY/Control Registers
IDMA OVERLAY
DM (0x3FE7)
RESERVED SET TO 0
IDDMOVLAY
IDPMOVLAY
00
0
00
0
00
0
15 14 1 3 12 11 10
9
8
7
6
5
4
3
2
1
0
SHORT READ
ONLY
0 = DISABLE
1 = ENABLE
IDMA CONTROL (U = UNDEFINED AT RESET)
DM (0x3FE0)
IDMAA ADDRESS
U
UUU
U
UU
U
15 14 13 1 2 11 1 0
9
8
7
6
5
4
3
2
1
0
IDMAD DESTINATION MEMORY
TYPE
0= PM
1= DM
NOTE: RESERVED BITS ARE SHOWN ON A GRAY FIELD. THESE
BITS SHOULD ALWAYS BE WRITTEN WITH ZEROS.
0
RESERVED SET TO 0
0
RESERVED SET TO 0
(SEE TABLE 12)
相關(guān)PDF資料
PDF描述
ACM28DTBS CONN EDGECARD 56POS R/A .156 SLD
ADSP-2187NKSTZ-320 IC DSP CONTROLLER 16BIT 100LQFP
ECC22DJWN-S1136 CONN EDGECARD 44PS .100 PRESSFIT
NML1212SC CONV DC/DC 2W 12VIN 12VOUT SIP
VI-B1V-CX-B1 CONVERTER MOD DC/DC 5.8V 75W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ADSP-2187NBSTZ-3202 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:DSP Microcomputer
ADSP-2187NKCA-320 制造商:Analog Devices 功能描述:DSP Fixed-Point 16-Bit 80MHz 80MIPS 144-Pin CSP-BGA 制造商:Rochester Electronics LLC 功能描述:32K PM/32K DM RAM,16-BIT,80 MIPS, 1.8V - Bulk
ADSP-2187NKST-320 制造商:Rochester Electronics LLC 功能描述:32K PM/32K DM RAM,16-BIT, 80 MIPS, 1.8V - Bulk 制造商:Analog Devices 功能描述:IC MICROCOMPUTER 16-BIT
ADSP-2187NKSTZ-320 功能描述:IC DSP CONTROLLER 16BIT 100LQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 嵌入式 - DSP（數(shù)字式信號(hào)處理器） 系列:ADSP-21xx 標(biāo)準(zhǔn)包裝:40 系列:TMS320DM64x, DaVinci™ 類(lèi)型:定點(diǎn) 接口:I²C，McASP，McBSP 時(shí)鐘速率:400MHz 非易失內(nèi)存:外部 芯片上RAM:160kB 電壓 - 輸入/輸出:3.30V 電壓 - 核心:1.20V 工作溫度:0°C ~ 90°C 安裝類(lèi)型:表面貼裝 封裝/外殼:548-BBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:548-FCBGA（27x27） 包裝:托盤(pán) 配用:TMDSDMK642-0E-ND - DEVELPER KIT W/NTSC CAMERA296-23038-ND - DSP STARTER KIT FOR TMS320C6416296-23059-ND - FLASHBURN PORTING KIT296-23058-ND - EVAL MODULE FOR DM642TMDSDMK642-ND - DEVELOPER KIT W/NTSC CAMERA
ADSP-2187NKSTZ-3202 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:DSP Microcomputer
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*